It is IBMs fault because for some it doesn't even work in Chrome, probably the associated software is c**p.

But it's the bank's fault for insisting that users must install a particular third-party extension. That is terrible policy!

Did no-one else go through the crappy years when certain institutions which should be accessible to all (banks, government, schools) would only work with e.g. Internet Explorer 4 and Flash? It's just the wrong way to do websites!

@mossman You have a point, but all banks here ask users to use this extension for there protection and I chose to so. In the end it is a developer's decision whether or not to develop separate strains for each and every browser available. I am not defending them but I do begrudge them not supporting Vivaldi or any other Chromium browser.
If I have to use FF to do my banking for now then I'll do that. No big deal.
The extension also does not work with Tor, Seamonkey, PaleMoon and many others. I am not even sure they support Safari although they do support other browsers on Mac.
Also, as far as I Know, they do not support any browsers on Linux and have no intentions of developing an extension for Linux browsers.
The extension protects users of over 380 banking and financial institutions (from the Bank of America to Zions Bank sites) and many small Credit Unions with the ability to add custom sites of your own.

Perhaps with MSEge moving to a Chromium base it will be easier to port it to Vivaldi.

@mossman You have a point, but all banks here ask users to use this extension for there protection and I chose to so. In the end it is a developer's decision whether or not to develop separate strains for each and every browser available. I am not defending them but I do begrudge them not supporting Vivaldi or any other Chromium browser.
If I have to use FF to do my banking for now then I'll do that. No big deal.
The extension also does not work with Tor, Seamonkey, PaleMoon and many others. I am not even sure they support Safari although they do support other browsers on Mac.
Also, as far as I Know, they do not support any browsers on Linux and have no intentions of developing an extension for Linux browsers.
The extension protects users of over 380 banking and financial institutions (from the Bank of America to Zions Bank sites) and many small Credit Unions with the ability to add custom sites of your own.

Perhaps with MSEge moving to a Chromium base it will be easier to port it to Vivaldi.

Following from what QuhNo said - I am surprised that that is standard policy where you live!

I have only ever had card-reader + user codes or other user-side cryptography in any of my online banking (since the early 1990s(*)). That means as long as I have a browser which supports secure transport then I am in control (even when I can't use my own device). Trusting third party products and then forcing your users to install stuff they know nothing about seems retrograde in comparison.

(*) The first bank I used did it old-school... sheets of random numbers sent on paper every few weeks which I had to compare against numbers they sent me (and then destroy) when I logged in and made transactions. Very "Third Man"!